This is it—the final matchup. We started with 32 potential names for our hypothetical placental ancestor. Now we’re down to two: Mancestor and Shrëwdinger. Which will it be? It’s your decision. Cast your vote now and give this creature a name!

Rising temperatures will lead to a massive “greening” of the Arctic by mid-century as a result of striking increases in plant cover, according to new research led by the American Museum of Natural History.

A video series on amnh.tv delves into the topic of dinosaurs, which arose some 230 million years ago and thrived until large dinosaurs became extinct about 65 million years ago. How did dinosaurs reproduce? A video explains.